Table 3.

Multiple linear regressions of Gd-IgA1 (mg/dL) on age, sex, race, MAP, eGFR, urinary protein level, and antihypertensive medication use (n = 123; consists of only patients with IgAN)

Independent variable	Regression coefficient (95% confidence interval)	p value
Age (years)	0.012 (−0.001 to 0.025)	0.073
Male (Ref: female)	0.127 (−0.170 to 0.423)	0.399
Greek (Ref: Japanese)	0.544 (0.232 to 0.857)	0.001
MAP (mmHg)	0.007 (−0.007 to 0.020)	0.329
eGFR (ml/min/1.73 m2)	0.004 (−0.003 to 0.011)	0.239
Urinary protein (g/gCr)	0.000 (−0.071 to 0.071)	0.994
Antihypertensive medication use, yes (Ref: no)	0.158 (−0.162 to 0.477)	0.331

Gd-IgA1, galactose-deficient IgA1; IgAN, IgA nephropathy; HC, healthy control; MAP, mean arterial pressure; eGFR, estimated glomerular filtration rate.